EPS Geofoam is one of the easiest fill materials to install — no compaction equipment, no moisture control, and no weather delays for rain.
Subgrade Preparation
Grade the subgrade to design elevation and compact to provide a stable, uniform bearing surface. Remove sharp rocks, debris, and organic material.
Block Placement and Course Layout
Place blocks in horizontal courses with joints staggered relative to the course below — a minimum offset of 12 inches is typical, 24 inches preferred.
Cutting and Fitting
EPS Geofoam can be cut with a hot wire cutter, a reciprocating saw, or a chainsaw. Hot wire cutting produces the cleanest cuts.
Connectors and Adhesive
In areas with potential uplift or on sloped surfaces, mechanical connectors or water-based adhesive may be required. Never use solvent-based adhesives.
Protective Cover Requirements
EPS Geofoam must be protected from hydrocarbons, open flames, and prolonged UV exposure. Install protective cover as soon as possible after block installation.
Key Takeaways
- Stagger block joints a minimum of 12 inches (24 inches preferred) between courses
- Use hot wire cutting for precision cuts — never use solvent-based adhesives
- Install protective cover (concrete slab or soil) as soon as possible after block placement
- Never allow vehicles to drive directly on unprotected geofoam
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